package top.majuan.study.study.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

@WebFilter(filterName = "EncodingFilter",urlPatterns = "*")
public class EncodingFilter implements Filter {
    public static final String UTF8 = "UTF-8";

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        // 设置编码
        servletRequest.setCharacterEncoding(UTF8);
        servletResponse.setCharacterEncoding(UTF8);
        System.out.println("编码拦截器统一处理:" + UTF8);
        // 放行请求
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }


}
